1 files changed, 44 insertions, 0 deletions
diff --git a/src/util/probes.h b/src/util/probes.h
new file mode 100644
index 000000000..349f29086
--- /dev/null
+++ b/src/util/probes.h
@@ -0,0 +1,44 @@
+/*
+    Copyright (C) 2015 Red Hat
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __PROBES_H_
+#define __PROBES_H_
+
+#ifdef HAVE_SYSTEMTAP
+
+/* Probe expansion inspired by libvirt */
+#define PROBE_EXPAND(NAME, ...) NAME(__VA_ARGS__)
+
+#define PROBE(NAME, ...) do {               \
+    if (SSSD_ ## NAME ## _ENABLED()) {      \
+        PROBE_EXPAND(SSSD_ ## NAME,         \
+                     __VA_ARGS__);          \
+    }                                       \
+} while(0);
+
+/* Systemtap doesn't handle copying NULL strings well */
+#define PROBE_SAFE_STR(s) ((s) ? (s) : "")
+
+#else
+
+/* No systemtap, define empty macros */
+#define PROBE(NAME, ...) do {         \
+} while(0);
+
+#endif
+
+#endif  /* __PROBES_H_ */